Low-energy flame thrower arrangement and a related method

Abstract

A method for creating flames, wherein combustible powder material is injected into a gas stream ( 120 ) and the dispersed mixture of powder and gas is ignited and discharged through a nozzle ( 124 ). An arrangement suitable for implementing the method is also disclosed.

1 - 15 . (canceled) 
     
     
         16 . A method for creating flames by a flame-thrower arrangement, characterized in that combustible powder material is injected into a gas stream ( 120 ) and the dispersed mixture of powder and gas is discharged through a nozzle, ignited, and blown out of the arrangement ( 124 ) so as to create a flame. 
     
     
         17 . A method according to  claim 16 , wherein said gas stream is divided into core and envelope components ( 122 ). 
     
     
         18 . A method according to  claim 16 , wherein turbulence is formed in the core component of said gas stream comprising core and envelope components, wherein the gas flow in the envelope component is optionally laminar. 
     
     
         19 . A method according to  claim 16 , wherein said gas stream is created by at least one element selected from the group consisting of: pressurized gas, blower and chemical gas generator. 
     
     
         20 . A method according to claim,  16  wherein said powder material comprises at least one element selected from the group consisting of: wood dust, potato flour, and wheat flour. 
     
     
         21 . A method according to  claim 16 , wherein the powder material further comprises additional particles or bodies for changing the color of the flame, producing odour or creating a pyrotechnic effect, such as an explosion or smoke. 
     
     
         22 . A method according to  claim 16 , wherein predetermined liquid is further injected into the gas stream for changing the color of the flame, producing odour or creating a pyrotechnic effect, such as an explosion or smoke. 
     
     
         23 . A method according to  claim 16 , wherein said mixture is ignited in the nozzle. 
     
     
         24 . A method according to  claim 16 , wherein fuel-to-gas ratio in said nozzle is at maximum about 20 kg/m 3  and at minimum about 0.02 kg/m 3 . 
     
     
         25 . An arrangement for creating flames, characterized in that the arrangement comprises a means ( 102 ,  102   b ) for injecting combustible powder material into a gas stream, a means for discharging the dispersed mixture of powder and gas through a nozzle ( 103 ,  103   b ,  108 ,  200 ,  300 ), and a means for igniting ( 103   b ,  204 ) the mixture blown out of the arrangement so as to create a flame. 
     
     
         26 . An arrangement according to  claim 25 , wherein the arrangement further comprises a means ( 304 ) for dividing said gas stream into core and envelope components. 
     
     
         27 . An arrangement according to  claim 26 , wherein the arrangement comprises a means ( 305 ) for forming turbulence in said core component of said gas stream. 
     
     
         28 . An arrangement according to  claim 25 , wherein said means for igniting ( 103   b ,  204 ) are integrated with the nozzle ( 103 ,  103   b ,  200 ,  300 ). 
     
     
         29 . An arrangement according to  claim 25 , wherein it further comprises a means for injecting liquid into the gas stream in order to change the color of the flame, produce odour or create a pyrotechnic effect, such as an explosion or smoke. 
     
     
         30 . A flame-thrower for creating visual effects by flames, characterized in that it comprises the arrangement of  claim 25 . 
     
     
         31 . A method according to  claim 17 , wherein turbulence is formed in the core component of said gas stream comprising core and envelope components, wherein the gas flow in the envelope component is optionally laminar.